Direct cotton dye.



Unrrun STATES arana oFFIOE.

JOSEPH TURNER, OF HUDDERSFIELD, ENGLAND.

manor co'r'rou DYE.

Specification of Letters Patent.

Batented May 26', 1908 Application filed February 23.; 1907. Serial No. 358,895.

cation.

The object of my invention is, by the admixture with certain direct dyeing cotton colors, or a combination of such colors, of suitable organic acid or inorganic salt or salts which dissociate irruthsatednhath .to, produce-an improved direct cotton dyje stufllf or composition of matter by'which brilliant and beautiful shades can be produced which. are fast 'to light and to alkalies.

In the course of investigation, I; have found that by mixing together certain direct cotton dyeing colors, or acombina'tioii'of certain direct dyeing colors, with a proportion of a suitableorganic acid, such as oxalic or tartaric, an inorganic acid'salt, such as hydrogen sodium sulfate, or any salts which l dissociate in a heated dye bath, such as am- IIIOIllllIH acetate, that such mixtures possess good dyeing qualities, and produce extremely brilliant and beautiful shades. Furthermore, the shades produced show decided advantages over the shades produced by-the individual component dye-stuffs, such as increased fastness to light, to alkalies, and'in point of brilliance. In one mixture, the l'ol-' lowing colors have been found suitable for the said purpose :.The 'sulfonated 1nono-di o tri-betanaphthylated rosanilins, with hich the acid or salt above named is mixed. In another mixture, the sulfonated mono-di or tri-beta naphthylated rosanilinson the. one hand'with the known cotton colors derived from henzidin, tolidin', dianisidin, or other similar para-diamins on the other hand are combined and mixed with the aforesaid acid orsalt.

'The proportions of the different ingredi' ents may vary very widely according to the shade and properties required in individual cases.

. It will be understood that the mixture or composition of matter mustcol nprise the ingredients mentioned in the first or second mixtures. The mixture of the acid or salt with the known cotton colors derived from benzidin, tolidin, dianisidin or other similar para-diamins would give no advantageous result. I

In carrying out this invention I may use parts sulfonated tri beta naphthylated rosanilin, 50 parts chlorazol. blue, 10 parts oxalic acid.

'No advantage is found in' mixing the oxalic acid with the chlorazol blue it the-first meru'ronedingredient is omitted, but it is advisable toad'dmhe'chlorazol blue so as to increase the fastness of the dye to alkalies and at the same time retain its maximum brilliance.

The other chemical substances hereinbefore'mentioned Which may be used instead of oxalic acid are its chemical equivalents in carrying out this invention; and sulfonated dibeta naphthylated rosanilin is thechemical equivalent of sulfonated tri beta naph thylated rosanilin in carrying out thisinvention, on account of the presence of sulfonic acid in each of these chemical substances.

In carrying out this inventionfrom' 5 to 30 parts of the suitable acid, such as oxalic acid and its chemical equivalents substantially as described, may be added to the suli'onated naphthylate'd rosanilin.

What I claim is: i

11A dye-bath, comprising sulfonated naptl-iylated ro iilin to which a suitable acid added substantially as described.

A bath, compr ing suliionated .ranilin, and ilorazol color, "inahlc acid is added substanlied.

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I "t rr pf 1 i l i Hui? 1n the presence. of two witnesses.

JOSICP H Tl R X ER.

'itnesses:

Enwxnn Cocxsimw. Tnonms H. Barium. 

